<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>图图片动了</title>
		<style>
			.Aoo{
				width: 100px;
				height: 100px;
				background-color: #00FFFF;
				transition: height 0.5s;
			}
			.Aoo:hover{
				height: 200px;
			}
		</style>
	</head>
	<body>
		<div class="Aoo"></div>
	</body>
</html>
